package org.blackjuly.sign.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.blackjuly.sign.util.StringUtil;

public class CharsetFilter implements Filter {
	
	private String encode = "utf-8";
	
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		String encoding = filterConfig.getInitParameter("encode");
		if (StringUtil.isNotEmpty(encoding)) {
			encode = encoding;
		}
	}
	
	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest)request;
		req.setCharacterEncoding(encode);
		chain.doFilter(request, response);
	}
	
	@Override
	public void destroy() {
	}
	
}